Product manufacture rental of heavy refractory metals
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A erojet Ordnance Tennessee, Jonesborough, a wholly owned subsidiary of aerospace and defense contractor Aerojet General, based in Sacramento, Calif. The company also produces components for sporting goods and other end uses, though defense accounts for about 80 percent of its business.
Tungsten heavy alloys are one of the densest metals produced. Reclaiming fabrication scrap was difficult and costly, prompting Aerojet to sell the scrap at significantly lower prices than it was worth as a recycled and reusable material.
The company uses tungsten heavy alloys for the properties they provide, including corrosion and radiation resistance, thermal and electrical conductivity and machinability. The alloys are formulated with tungsten 85 percent to 98 percent and binders nickel, iron, copper and other elements.
Densities for tungsten heavy alloys range from 1, to 1, pounds per cubic foot 17 to For example, Aerojet manufactures counterweights from the material, which can be fabricated in smaller sizes than counterweights made with other metals in light of the density of the tungsten heavy alloys.
The alloys and other refractory metals Aerojet works with are like ceramics in that they do not melt, but are compacted from powder into shapes and sintered to full density, after which they are machined and finished. Scrap is generated as a result of compaction, sawing of large blocks and other processes.
The aerospace and defense industry remains one of the healthier sectors in the global economy. Investments play a major role in the industry. Fuel cells are expected to power a wide range of military and civilian aircraft around the world. Aerojet has experimented with techniques to reclaim tungsten heavy alloys scrap, including using a hammer mill and manually downsizing pieces.
None of the methods was efficient or produced consistently sized particles. With manual reclaim, "labor costs were prohibitive and the results uneven," says Tim Brent, project engineer. Aerojet, consequently, wound up selling the scrap to dealers.
After testing the performance of several size-reduction machines, comparing particle sizes, consistency and economy, Aerojet decided on an SCC 15 Screen Classifying Cutter from Munson Machinery Co. The cutter is engineered to downsize hard materials like tungsten heavy alloys into controlled particle sizes with few fines and no heat buildup.
Key to its efficiency, according to Munson, is a helical rotor with dozens of tungsten-carbide-tipped cutter heads attached to an array of interconnected parallelograms that creates a steady and even cutting action against a pair of bed knives with each turn of the rotor, yielding particle uniformity. Most cutters and granulators, by contrast, have rotors with a smaller number of angled blades that deliver scissors-like cuts.
The helical rotor efficiently moves material to take full advantage of the screen area, preventing "hot-spotting. Munson says the rotor design generates six times greater force per inch with each cut than conventional knife-type cutters of equivalent horsepower, contributing to uniform size reduction and reduced energy use. The cutter has a The teeth slide onto each machined holder and screw into place, speeding changeover.
The two proprietary hardened tool-steel bed knives are reversible, meaning that when one edge wears down, the other edge can be used. When both edges of a knife become dull, they can be resharpened. The average rotor speed is 2, rpm, which can be changed by installing different size sheaves or by using a variable speed drive.
Brent says, "After a year in operation, the cutter has not required any significant maintenance. Actually, the cutter "sees surges of several pounds over a matter of seconds," he notes, as feeding is intermittent. The downsized material occasionally requires fine-milling, "but in some applications we can go directly from the cutter to the compaction process," Brent adds.
Aerojet specified an abrasion-resistant interior and a special stand to accommodate containers used in moving scrap to the process machines, which Munson Machinery accommodated.
Brent says Aerojet currently does not have plans for more cutters, but if increased capacity is required, the company will add options that automate cleaning, which is currently a manual affair. This text was submitted on behalf of Munson Machinery, Utica, N.
The company can be contacted at info munsonmachinery. E xtended downtime" are two words a scrap yard manager never wants to hear. In the fast-paced scrap metal industry, time truly is money, and the bottom line is greatly affected by the productivity of machinery.
One way scrap yard managers can avoid the aforementioned scenario involves placing a high priority on hiring quality technicians to ensure that their fleets of equipment are operating at maximum productivity. While some maintenance workers may learn and enhance their skills through on-the-job training, graduates of industrial maintenance programs at technical schools are being recruited by an increasing number of industries.
Scrap recyclers might benefit by taking notice of these programs, too. Sources contacted for this feature are not widely aware of any graduates being placed in the scrap metal industry, but professors from industrial maintenance programs are confident their graduates can handle the equipment maintenance required in scrap yards. The core curriculum for industrial maintenance programs is essentially the same for all colleges. Programs contain coursework in hydraulics, welding, pneumatics, fluid power, troubleshooting, preventive maintenance and programmable logic controllers PLCs.
Additional attention may be given to electronics, safety, disassembly, lubrication, gearing systems and blueprint reading. Industrial maintenance programs contain both classroom and hands-on lab components. Students spend about 30 percent of their time in a lecture setting and about 70 percent doing lab activities, according to Ken Flowers, professor at Lake Michigan Community College, Benton Harbor, Mich.
Many technical colleges also offer some form of continuing education for professionals already in the industry who want to expand their skill sets. Kentucky is making it even easier for maintenance workers to expand their skill sets. The state is in the process of modularizing the curriculum for industrial maintenance continuing education programs, changing back to a task-based, competency-based curriculum.
Under this new self-paced program, students will be able to complete the lecture portion of their curriculum at home via the Internet. Then, Big Sandy and other technical colleges in the state will offer open labs where students can come as their schedules allow to work on their tasks at their own pace, Moore says. Some may finish the task in two weeks, some might take a month or two. After students complete the required online lecture portion and have completed every task, they will receive their certifications or diplomas.
Given the accessibility and variety of industrial maintenance education programs at technical colleges, scrap yards may find them a suitable source for filling positions for maintenance technicians, either by hiring recent graduates or educating workers they already employ. While the scrap metal industry has yet to fully tap into the talent pool provided by industrial maintenance graduates, businesses in other industries are certainly taking advantage, including some Fortune companies.
For large and small companies alike, the demand for industrial technicians appears to be sky high, particularly in the Minnesota area served by Riverland.
Bender adds that the demand for industrial technicians may be increasing even more in the coming years. The rising demand for industrial technicians coupled with the thriving scrap metal industry may appear to be cause for concern for operations managers seeking to minimize downtime.
However, scrap recyclers can help ensure the availability of industrial technicians by setting up apprenticeship programs or co-ops with industrial maintenance programs. One of the most common reasons professors give for why the scrap industry has yet to fully embrace their industrial maintenance programs is that class times often conflict with operating business hours for scrap yards.
Fortunately, technical school professors say there is a solution. By setting up an apprenticeship or co-op, industrial maintenance students can gain valuable experience learning from other technicians at the scrap yard while also attaining the classroom tutelage needed to succeed in the industry. Nearly all colleges indicated their willingness to work with companies to set up apprenticeships or co-ops where students can work at their future place of employment while also taking classes.
Do what works for you. We try to help companies out as much as possible. Most schools will then meet with the company, address its specific needs and create a curriculum best suited for its operations. Some even provide apprenticeship program options that have worked well for other companies. Even if scrap recyclers are not in a position to enter into a co-op or apprenticeship, there are plenty of ways to get involved with the recruitment of local college graduates.
Additionally, they can come in and make classroom presentations to our students," says Steve Arocha, professor at Texas State Technical College in Waco, Texas. Whether setting up apprenticeships, recruiting recent graduates or expanding education for current employees, the opportunities to capitalize on the resources offered by technical colleges are broad. And given that there are at least technical colleges throughout the country that offer industrial maintenance programs, according to CollegeBoard.
The author is an intern with the Recycling Today Media Group. H andling and recycling 3, pounds of aluminum chips daily is a big task for most precision machining operations. Until now, that is, for one Minneapolis company. Production Engineering Corp. The precision parts manufacturer has taken steps to recognize chip handling and recycling as an extremely important function of the entire manufacturing process.
The importance is not just in the added value for the aluminum briquettes it generates, but also in a number of better manufacturing practices Production Engineering now adheres to that indirectly adds more profit to its bottom line.
Today, the company is a leading provider of complex precision parts for the military and aerospace industries. Production Engineering views its aluminum chip generation, handling and disposition as a key revenue factor in the projects it handles.
Minneapolis-based Kurt Manufacturing approached Production Engineering at that time with its new chip recycling technology, the Kurt Chipmunk Chip Compactor.
Our scrap dealer picked up our wet chips in barrels every day and paid us by the pound. However, we heard how Kurt Manufacturing improved its method of dealing with aluminum chips and its new Chipmunk compacting system, so we had them pay us a visit to discuss options. Chip compacting and recycling has been around for decades. Payment was made at a flat rate, by the pound, and not at prevailing market rates that were traceable.
Plus they were being penalized on the scrap price because the chips were wet with machine coolant that had to be removed before the smelting process could begin. Kurt studied the precision machining market and saw that only a small percentage of machine shops like Production Engineering were compacting chips, and those that were did not always employ a cost-effective method.
Kurt says it recognized this opportunity and focused on developing new chip compacting technology based on its own experience rather than replicate what was already being sold to the market. Kurt Manufacturing claims the Chipmunk can compact chips more consistently and efficiently than conventional hydraulic compactors that require twice the horsepower.
It has a single auger feeding design that operates from a powerful, but simple, compression plate that forms and compresses the wet chips into 3. Also, this patented compactor design wrings out up to 98 percent of residue coolant, producing neat, firm briquettes that are dry to the touch and require no further coolant removal. The recovered coolant collects in a separate reservoir at the base of the Chipmunk system, ready for filtration and reuse.
According to Kurt Manufacturing, the Chipmunk has a payback of one year or less on most installations. Instead of gallon barrels, he says the new recycler provided Production Engineering with Gaylord boxes measuring 40 inches by 48 inches by 48 inches, accommodating 3, pounds of compacted briquettes.
An empty box is substituted for it, with the process repeated until the trailer is filled," Emmert says. This process really is much more efficient than the old method, according to Production Engineering. A fork truck stacks the fully enclosed briquette-filled boxes neatly inside the trailer. When filled, a replacement trailer load of empty boxes is delivered, and the full trailer is driven to the recycler. All chips are processed through the Chipmunk compactor the same day they are generated, and the recovered coolant is filtered and readied for reuse.
This new method eliminates any chance of wet chips draining coolant onto the floor or parking lot surfaces that could necessitate cleanup.
A erojet Ordnance Tennessee, Jonesborough, a wholly owned subsidiary of aerospace and defense contractor Aerojet General, based in Sacramento, Calif. The company also produces components for sporting goods and other end uses, though defense accounts for about 80 percent of its business. Tungsten heavy alloys are one of the densest metals produced. Reclaiming fabrication scrap was difficult and costly, prompting Aerojet to sell the scrap at significantly lower prices than it was worth as a recycled and reusable material. The company uses tungsten heavy alloys for the properties they provide, including corrosion and radiation resistance, thermal and electrical conductivity and machinability.
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Никакого кольца. Я так близок к цели, - подумал. - Ein Ring! - повторил Беккер, но дверь закрылась перед его носом. Он долго стоял в роскошно убранном коридоре, глядя на копию Сальватора Дали на стене.
Очень уместно, - мысленно застонал. - Сюрреализм. Я в плену абсурдного сна. Проснувшись утром в своей постели, Беккер заканчивал день тем, что ломился в гостиничный номер незнакомого человека в Испании в поисках какого-то магического кольца.
Суровый голос Стратмора вернул его к действительности.
Я вовсе не так богат, я простой преподаватель. Но я скажу тебе, что собираюсь сделать… - Скажу тебе, что ты наглая лгунья, вот что я сделаю. - Пожалуй, я куплю тебе билет. Белокурая девушка смотрела на него недоверчиво.
Теперь он мог принимать заказы в любой точке мира. Сообщения поступали мгновенно, и их нельзя было отследить.
Все обошлось. Сьюзан огляделась. Третий узел был пуст, свет шел от работающих мониторов.
- С какой стати такой параноик, как Танкадо, доверился столь ненадежному типу, как Хейл. Сьюзан понимала, что теперь это не имеет никакого значения. Нужно немедленно доложить обо всем Стратмору.SEE VIDEO BY TOPIC: Refractory Material Manufacturer
На этом Мидж капитулировала: - Хорошо. Доброй ночи. - Она двинулась к двери. Когда Мидж проходила мимо, Бринкерхофф по выражению ее глаз понял, что она и не думает сдаваться: чутье не позволит ей бездействовать. Бринкерхофф смотрел на массивную фигуру директора, возвышающуюся над письменным столом.
- Вводите ключ и кончайте со всем. Джабба вздохнул. На сей раз голос его прозвучал с несвойственным ему спокойствием: - Директор, если мы введем неверный ключ… - Верно, - прервала его Сьюзан. - Если Танкадо ничего не заподозрил, нам придется ответить на ряд вопросов. - Как у нас со временем, Джабба? - спросил Фонтейн. Джабба посмотрел на ВР.
- Около двадцати минут.
- Я видела сообщение… в нем говорилось… Смит кивнул: - Мы тоже прочитали это сообщение. Халохот рано принялся считать цыплят. - Но кровь… - Поверхностная царапина, мадам. Мы залепили ее пластырем.
Сьюзан лишилась дара речи.
Я должен был знать. Да взять хотя бы его электронное имя. - Боже мой, Северная Дакота.
Росио задумалась. - Нет, больше. В этот момент кровать громко заскрипела: клиент Росио попытался переменить позу. Беккер повернулся к нему и заговорил на беглом немецком: - Noch etwas.
Хиросима, 6 августа 1945 года, 8.
Отключить ТРАНСТЕКСТТеперь это нетрудная задача, поскольку она находится возле командного терминала. Она вызвала нужное командное окно и напечатала: ВЫКЛЮЧИТЬ КОМПЬЮТЕР Палец привычно потянулся к клавише Ввод. - Сьюзан! - рявкнул голос у нее за спиной. Она в страхе повернулась, думая, что это Хейл.
Именно он и подал ручную команду на отзыв Следопыта. Вопрос насколько. уступил место другому - с какой целью?. У Хейла не было мотивов для вторжения в ее компьютер. Он ведь даже не знал, что она задействовала Следопыта.
Стандартная для АНБ процедура. Мне нужно знать, с кем я имею. - Глаза ее смотрели сурово. - Доктор.